Common Lottery Algorithm
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Anonymous
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con't from above
You also have to assume that Schools A, B and C only have one available seat |
Anonymous
| Schools don't rank you in DC. The link from the Post described New Orleans. |
Anonymous
| In DC the only thing that would matter is the lottery numbers of children A, B and C. |
Anonymous
Yes they do. They're called preferences and they along with a random number assignment determine your position in the algorithm. |
Anonymous
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http://www.myschooldc.org/faq/#common-10
What are preferences (sibling preference, proximity preference, in-boundary preference)? Students may have a preference at one or more schools. Students with a preference at a particular school are offered space at that school before students who don’t have a preference. There are four types of preferences: Sibling preference (DCPS and public charter schools). Your child will have a sibling preference at a school where a sibling is currently enrolled. Some schools also offer a preference in the lottery and/or on the waiting list to siblings of accepted students. For example, if you have two children applying to the same school this year and one is accepted, the school may offer a preference to the accepted child’s brother or sister. These preferences vary by school, so if you have questions, it’s best to contact the school. If your child is admitted with a sibling preference, be prepared to prove that your children are siblings when you enroll them. (DCPS specialized high schools do not offer a sibling preference.) Proximity preference (DCPS only). Your child will receive a preference if he or she lives within a reasonable walking distance of a school. (DCPS high schools do not offer a proximity preference.) In-boundary preference (DCPS PK3 and PK4 only). PK3 and PK4 students receive a preference at their in-boundary DCPS schools. Adams-boundary preference (Oyster-Adams Bilingual School only). In 2007, John Quincy Adams Elementary School merged with Oyster Bilingual School. Students living in the boundary of the former Adams Elementary School get a preference when applying to Oyster-Adams. |
Anonymous
yeah, that's completely and utterly incorrect. |
Anonymous
Good gravy. How many times to people have to say that this is NOT CORRECT???? |
Anonymous
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Read up folks:
http://kuznets.fas.harvard.edu/~aroth/papers/aer.NYCSchools.Dec2009.pdf The model for which this lottery is based can be found on page 4 and will most likely only be tweaked in the manner of tiebreakers. All that myschooldc doesn't define is what the tiebreaker in each applicant pool is. you can't have all the kids who have siblings at the same school based rank (THIS IS NOT THE SAME AS THE STUDENT RANKING THE SCHOOL DAMMIT). They have to do some sort of random number assignment at this point. Let's say 100 kids selected the school, then the school has to rank each of those kids 1 through 100. That's how the algorithm gets started. The rest is the student application proposing acceptance to the school or moving on. |
Anonymous
So we've got one poster describing the New Orleans system, and now another describing the NYC system. But we live in DC. |
Anonymous
Preferences are something completely different from school rankings. |
Anonymous
In the example given, where schools give a ranking, and the PP is indeed correct. In DC, schools don't rank, and if they did it wouldn't matter anyway. Granted, the PP is not quite correct in saying the "only thing that would matter is the lottery numbers," if the three kids were of different preference levels that would matter. But in the hypothetical nothing is said about preference levels, when all three are of the same preference level then the only thing that matters is lottery numbers. |
Anonymous
No they aren't. The school puts each kid into a pool of applicants pool 1 (Sibling) pool 2 (Proximity) pool 3 (No Pref) within each of those pools they create tiebreakers (some kind of random number assignments). Those tiebreaks are used to rank the children within the pools. This is the same in NYC, New Orleans, Denver and in DC. |
Anonymous
They are all the same system, all run by the same company. |
dcmom
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An example of the specifics of how the lottery in Denver works--which is what I believe DC will be doing-is on page 25 in Example 2 in the appendix of this paper: https://www2.bc.edu/~sonmezt/sc_aerfinal.pdf. This paper is linked to from the website of the company that is setting up the lottery.
It's very complicated. But essentially, it optimizes the number of people who are matched to a high-choice school, and the ranking of the schools by the applicants does matter. (It definitely matters less than sibling/founder/boundary preferences, though.) And the schools do "rank" the students, via a random lottery number, within the preference brackets. |
Anonymous
Same way it works in Denver, New Orleans, NYC and in previous years, DC. |